This table is derived from the Second ROSAT Source Catalog of Pointed
Observations with the ROSAT PSPC (Roentgen Satellite Position-Sensitive
Proportional Counter) Observed Using the Boron Filter, or the 2RXF Catalog.
2XRF contains arcsecond positions and count rates for 2,526 detected sources
from 258 ROSAT PSPC Filter observations covering 0.15% of the sky, including
704 high-confidence detections and 20 obvious sources which were not detected
by SASS.

This table contains the complete version of the list of detections (2,526
entries), whereas the short 'high-confidence' version (the HEASARC's
ROSPSPCF table) contains 704 detections. The
ROSPSPCFTOT table includes many questionable sources that meet the following
parameter criteria: false_det = 'f' or deferred = 'D' or not_checked = 'n'.
See the documentation below for descriptions of these parameters.

The catalog consists of all primary source parameters from the automated
detection algorithm employed by the SASS. In addition each observation has
been quality checked, both by automatic algorithms and by detailed visual
inspection. The results of this quality checking are contained as a set of
logical-value flags for a set of principal source parameters. If a source
parameter is suspect, the associated flag is set to a corresponding
alphabetical value; parameters with no obvious problems maintain the default,
'.', value.

The Second ROSAT Pointed PSPC Filter Source Catalog includes missing sources,
i.e. obvious sources which were not detected by the SASS source detection
software but which could be easily detected by visual inspection. Missed
sources are marked by negative values of their source identification number,
i.e. the parameter 'MPLSX_ID' has a negative value for these sources. The
only tabulated quantities for these visually identified missed sources are
source positions; other quantities (like count rates, hardness ratios, etc.)
are not available.

These data have been screened by ROSAT data centers in the US, Germany, and
the UK as a step in the production of the ROSAT Results Archive. The RRA
contains extracted source and associated products with an indication of
reliability for the primary parameters.

Sequence_Detection_Name
The ROSAT detection sequence number, e.g.,
'2rf500043n00.135' for the source with the merged source list identification
(the mplsx_id parameter) value of 135 from the observation with ROSAT
seqid of rf500043n00, or '2rf110133n00.999' for the source with mplsx_id = -1
from the observation with ROSAT seqid of rf110133n00.

SeqID
The ROSAT sequence identification number (e.g. rf500043n00), where the prefix
is always 'RF' for a filtered PSPC pointed observation, and next 6 characters
are the ROSAT observation request sequence number or ROR, with the final 3
characters after the ROR number being the follow-on suffix containing the
index identifier.

Name
The 2RXF source designation, e.g., '2RXF J000548.1+285515', based
on the J2000.0 equatorial coordinates of the source.

RA
The Right Ascension of the source in the selected equinox. This
was given in J2000.0 decimal degrees to a precision of 10-4 degrees
(0.36 arcseconds) in the original table.

Dec
The Declination of the source in the selected equinox. This
was given in J2000.0 decimal degrees to a precision of 10-4 degrees
(0.36 arcseconds) in the original table.

Count_Rate
The estimated net count rate of the source in PHA channels 11
to 235 (0.1 - 2.4 keV) from either ML or MDETEC (if the mdet parameter has
a value of 'M'), in counts per second. (The ML algorithm was never run
for sources further than 20 arcminutes from the field center).

Count_Rate_Error
The uncertainty in the net count rate of the source,
in counts per second.

Md_Like
The source likelihood from the L/MDETEC algorithm, MD_LIKE.
If the value is >= 1000, it has been truncated to 999.9.

Off_Axis
The off-axis angle of the source averaged over the observation,
in arcminutes.

Vary
The source variability flag, with the possible values of
'NEGATIVE' (not variable), or 'POSSIBLE' for possible variable.

SrcFlags
This parameter contains a concise summary of the 13 source flag
values for the given source in the order given below (these values are
also given as individual parameters), where a '.' value means that the
flag is not set:

Confused
This flag parameter is set to 'c' to indicate that close sources
may have confused the detection algorithm.

Det_Struct
This flag parameter is set to 'd' to indicate that the source
is near a detector structure.

Extended
This flag parameter is set to 'e' to indicate that the source is
probably resolved.

False_Det
This flag parameter is set to 'f' to indicate that the detection
is judged to be spurious.

Inten_Susp
This flag parameter is set to 'i' to indicate that the source
intensity is suspect.

Spec_Susp
This flag parameter is set to 's' to indicate that the source
spectrum is suspect.

Ltc_Susp
This flag parameter is set to 'l' to indicate that the source
lightcurve is suspect.

Mult_Det
This flag parameter is set to 'm' to indicate that this is
complex emission split into individual sources.

Not_Checked
This flag parameter is set to 'n' to indicate that the source
was not checked visually by an operator.

Pos_Susp
This flag parameter is set to 'p' to indicate that the source
position is suspect.

Associated
This flag parameter is set to 'a' to indicate that another
source nearby may be influencing the derived source properties.

Varflg_Susp
This flag parameter is set to 'v' to indicate that the SASS
variability flag is suspect.

Within_Ext
This flag parameter is set to 'w' to indicate that the source is
within extended emission.

SeqFlags
This parameter contains a concise summary of the 8 sequence flag
values for the given source in the order given below (these values are
also given as individual parameters), where a '.' value means that the
flag is not set:

Srcdist
The corrected source-nearest source distance, in arcminutes. (The
HEASARC notes that there are 31 detections with values of 999 much bigger than
the PSPC field of view, the significance of these values is not known.)

Vignetting
The vignetting factor V at the source position, i.e., the
number that the observed count rate C was divided by to give the corrected
net on-axis equivalent count rate N , i.e. N = C/V.

Background
The background count rate for the observation, in units of
counts s-1 arcmin-2. (Values of 100 or greater have been truncated to
99.99).

Priority
The source detection string flags. These flags indicate the
sliding window detection history using either the background map (MDETEC) or
the local background (LDETEC), in the hard, soft and broad bands, and take the
values 0 for no detection, or 1 for a detection. The order of the flags is:
MDETEC-broad, LDETEC-broad, MDETEC-hard, LDETEC-hard, MDETEC-soft and
LDETEC-soft.

Detect_Band
This flag parameter indicates in which band the ML detection
occurred, as follows:

MPLSX_ID
The source number from the merged source list (MPLSX).
The 2RXF Catalog includes 'missing' sources,
i.e. obvious sources which were not detected by the SASS source detection
software but which could be easily detected by visual inspection. Missed
sources are marked with negative values of the mplsx_id parameter.

Mdet
This flag parameter is set to 'M' to indicates that the count rate
and other parameters were obtained using MDETEC rather than LDETEC.

Ml_Like
The source likelihood from the ML algorithm, ML_LIKE.
If the value is >= 10,000, it has been truncated to 9,999.

Extraction_Radius
The source extraction radius used in the ML algorithm,
in arcseconds.

Extent
The width (sigma) of the Gaussian fitted to the source
to characterize its extent, in arcseconds.

Extentlik
The likelihood of the source being extended.
If the value is >= 10,000, it has been truncated to 9,999.

Csq_Flag
The source variability based on the chi2 test, where
'.' means not variable, 'c' means variable.

Ks_Flag
The source variability based on the K-S test, where
'.' means not variable, 'k' means variable.

U_Flag
The source variability based on the U test, where
'.' means not variable, 'u' means variable.

Fft_Flag
The source variability based on the FFT test, where
'.' means not variable, 'f' means variable.